Coil



Apr. 24, 1923. 1,452,939

C.SPARKS ET AL 2 Sheets-Sheet 1l lll/11111111111. 'lill/[111111,

Apr. 24, 1923. 1,452,939

C. SPARKS ET AL COIL Filed Jan. 9, 1920 2 Sheets-Sheet 2 Patented Apr. 24, 1923.

UNITED STATES PATENT OFFICE.

y CHARLES SPARKS, OF OAK PARK, ALTD INILIIAF'L G. SHULL, OF CHICAGO, ILLINOIS, ASSIGNORS 'IO KELLOGG SII'ICIEOARD All?) SUPPLY COIZIPANY, 0F CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

COIL.

Application filed January 9, 1920.

To all' 207mm t may concern:

Be it known that We, CHARLES SPARKS and WViLLniM G. SHULL, citizens ot the United States of America, residing in Calz Fark and Chicago, respectively, county oit Cook, and State of Illinois, have invented certain new and useful Improvements in Coils, orp which t-he following is a specilication.

Cur invention relates to repeating coils or transformers for use in electrical circuits, and an object of our invention is to produce an improved device ot the class described which will embody desirable features and advantages, all in a simple, eiiicient and economical manner, and to this object and such other objects as may appear, our invention consists in the novel details of construction, parts and combination of parts to be hereinafter' more fully described and more particularly pointed out in the ensuing specilication and the appended claims.

A feature of our invention is the method of supporting the coil oi" the transformer upon the core ot the transformer and to securely hold the said winding upon the core of the transformer against movement. This method oit construction provides a transformer of compact construction and one which takes up a minimum amount of space when mounted.

.A further feature of our invention is the method of constructing the repeater` so that when mounting the same in a telephone switchboard, no special mounting means is necessary as the coil of our invention may be mounted upon the relay rack of the board upon relay mountings, as is well understood in the art. The above features as described., as well as others, will be more :fully hereinafter described in the following specification and in the appended claims.

For a more complete understanding of our invention, reference is to be had to the 'accompanying drawings, in which like reterence characters in the several views denote like parts, and in which-- Fig. l is a front elevation of one form of repeating coil, with the enclosing casing in section;

sei-iai no. 350,316.

Fig.` 2 is a plan view of Fig. l, with the enclosing casing or cover in section;

Fig. 3 is a lett side elevation of Fig. l with the enclosing casing removed; Y

F ig. i is a sectional view along the line 4&4 of F 3;

Fig. 5 is a sectional view along the line 5-5 of Fig. l;

F 6 is a sectional view along the line 6 6 of Fig. 3;

Fig. 7 is a trout elevation of another form oi repeating coil, showing the enclosing casing in section; i

Fig. 8 is a plan view of Fig. 6 with the enclosing easing or cover in section;

Fig. 9 is a left side elevation of Fig. T with the enclosing casing removed; Y

Fig. l0 is a sectional view along the line lO-lO of Fig. 9

Fig. ll is a sectional view along the line ll-ll of Fig. 7;

F ig. l2 is a sectional view along the line l2-l2 of Fig. 9.

Referring now more in detail to our invention as illustrated and referring more particularly to Figs. l to 6, inclusive, the repeating coil as illustrated in the said igures is ot the ring-through type, for uses and purposes as are well understood in the art. The repeating coil as illustrated comprises a coil C built up of a plurality of windings a, o, c 4and Z wound upon` the spool S. A

rFhe spool S comprises spool heads 2 and 3, made of any suitable insulation material such as balelite. The heads 2 and 3 have suitable openings ot a size to receive. the insulation strips and 5 and the thin metal strips (S and '7. The metal strips G and 7. when in place in the respective heads 2 and 3, protrude slightly, and these protruding ends are turned over to hold the heads iii place., and insulation strips l and 5, in assos ciatien with strips 6 and 7, when in place form a central opening S. The coil C and spool S, a whole. are carried bv a core which is made of what might be called 8- shaped laminations 9. The laniinations 9 are split at l0 so that they may be inserted into the central opening 8 of the spool S.

To clamp the lamin Aons 9 against movement and to also hold the coil S as a whole upon the core portion 11 or the -shaped laminations 9, l provide posts 12, 13, 1 4 and 15, which are provided with recessed portions 16 which iforni shouldl 17 and 18 upon each. o1I the posts 12, 3, 14 and 15. rllhe posts 12, 13, 14 and 15 are secured to a bottoni plate 19 ot suitable insulation inaterial, such as balrelite, means ot wood sore is 20, which pass through suitable openings in the plate 19 and screw into the ends of, the posts 12, 13, 14 and 15. The posts 12, 13, 14 and 15, when secured to plate 19 as just described and the coil C in the position just described, the head 3 of the spool ot the coil C rests upon the respective shoulders 18 formed by the recesses in the i, osts 12, 13, 14 and 15, and the head 2 oit the spool S of the coil C rests against the shoulders 17 o1l recesses 1G of the posts 12, 1o, 14 and 15. A terminal plate 21 ot suitable insulation material is provided, upon whii-h terminals 22 are n'iountld and secured thereto in any suitable manner, lie said plate 21 resting against the top of the posts 12. 13, 14 and 1 5. A clamping plate 23 is provided which is placed on top oli the terminal plate 21 and is provided with suitable openings 24 through which the terminals 22 extend. The clamping plate 23 is secured to the posts 12, 13, 14 and 15 by means ot wood screws which screws pass through suitable openings 26 in the plate 23 and openii in the plate 21 and screw into the posts i2, 13, 14 and 15, thus clamping the terminal plate 21 between the clamping plate 23 and the tops of posts 12, 13, 14 and 15. The posts 12, 13, 14 and 15, when secured to the plates 21 and 23 as jus described, secure the coil C in place upon the core portion 11 of the 8- sliaped lainiiiations 9 t movement in an up and down direction upon the said core portion 11, and the .said laminat-ions 9 are at the saine time clamped between the posts 12 and 13, and 14 and 15.

The terminals 30 oit the windings ot the coil C' are connected to the terminals 22 in any suitable manner.y as'by means ot soldering. An enclosingcasing or shell 31 provided which is slipped over the repeating coil as a whole, the bottom ot which provided with suitable openings 32 o1 a size to receive sleeves 33 ot insulation through which the termina s 22 are to pass, the said sleeves 33 insulati g 'the terminals 'troni the casing 3 l. The tei-iiiinals `torni tei-iniiials vlor the coil windings and perniit eX- ternal connections 'with the said coil windings. Bolts 34 Vtoil securing the repeating .coil as a whole to the casing are provided,

the said bolts 34 beine; iiovided with s nare y i portions 3o which set into square orilires 3G iii the terminal plate 21. The head or conical portions 37 o'l; the bolts 3lset in countersunk openings 3S in the bottoni Jface of the plate 23, and when the clamping plate 23 is secured by means ot the screws 25, the said bolts 34 are held in place by means ot the conical portion 37 entering the countersunk openings 33 and are held against rotation due to the square portion setting into the square openings 36 in the terminal plate 21.- Nuts 40 are provided and have screw-threaded engagement with the bolts 34, thus securing the transformer as a whole 'to the shell 31. A over oi cap 41 lior covering the opening in the shell 31 is provided and has ears 42 and 43 struck up at right angles itrom the cover 41, the said ears and 43 being diainetrically oppositeeach other. rlhe cover 41, when in place, rests against the bottom edge 44 of the shell 31 and the ears 42 and 43 project up into the shell 31 'for a short distance. Screws 45 are provided which pass through suitable openings in the shell 31 and have screw-threaded engagement with suitable tapped openings in the ears 42 and holding the said cover l1 in place upon the shell 31.

Referring now to Figs. 7 to 12, inclusive, we illustrate another form of repeating coil known in the art as a non-ring-through repeating coil, whose functions are well understood in the art. Referring now in detail to the repeating coil as illustrated, it comprises a a coil C made up olf a plurality of windings suitably separated and wound upon the spool S. The spool S upon which the windings a', 5, c and d are wound is constructed similar to the spool described in connection with Fi 1 to 6, and a description of spool S is not thought necessary. The windings and the saool S as a whole are carried by a core which is built up of a plurality of laminat-ions 50, rectangular in shape and provided with a coie portion 51 which extends upward and upon which the coil C as a whole is supported. A space 52 between the top o1 the core portion 51 and the inner edge ot the top portion ot' the laminations permits the laininations 50 to be slipped in the central opening o'l the spool S. To hold the coil C upon the core portion 51. provide sliinis 53 and 54, which are forced in between the faces 55 and 56 of the laminations 5() and the inner faces 57 and 58 of the central openingl of the spool S to hold the coil C against movement. Posts 59, 60.y (il and (32 are provided and are secured to a mounting plate o3 by ineai'is of wood screws (Sal. the said posts being provided with recessed portions and the said spool S rests in these recesses. The heads or' the spool S engage the shoulders G6 and 67 formed upon the posts 59. (Si), 61 and 62 by the recesses 65 when the posts are iii place to prevent thil coil C troni moving up and down upon the core portion 51, as described in connection with the repeating coil as shown in Figs. 1 to A terminal plate 68 and clamping plate ,.69 are secured to the posts 59, 60, 61 and 62 in a manner similarly described in connection with the preceding figures, and the method of securing the coil as a whole and of securing the cover plate 7l to the shell is also similar to that described in connection with Figs. l to 6, and a 'further description is not thought necessary.

While we have described a certain orin of our invention, it is to be understood that changes and modifications will readily suggest themselves, and we do not wish to be limited to the exact structures as shown, but aim to cover all such changes and modiications as come within the spirit and scope of the appended claims.

Vhat we claim as new and desire to secure by United States Letters Patent, is:

l. In a repeating device, a rectangular coil comprising a plurality of windings, a laminated core upon which said coil is supported, mounting plates, two sets oi'' posts positioned between said mounting` plates and secured thereto, the said posts securing the coil upon the said core against movement, the said core being adapted to extend between the two sets of two posts to clamp and maintain said core in position against displacement.

2. In a repeating device, a rectangular coil comprising a plurality of windings, a core built up ot' a plurality ot' laniinations upon which said coil is mounted, mounting plates, four posts positioned between said mounting plates and secured thereto, the said posts clamping said laminations in position and also securing said coil upon said core against movement.

3. In a repeating device, a core built up of a plurality of laminations, coil having a plurality of windings mounted upon said core, mounting plates, fourposts positioned between said mounting plates and secured thereto, said plurality of laininations being compactly clamped between and held in position by said posts, the said posts also positioning` said coil upon said core between said mounting plates and securing` the said coil upon said core against movement.

4:. In a repeating device, a core built up ot a plurality ot laniinations, a coil mounted upon said core and having a plurality ot windings, mounting plates, tour posts positioned between said mounting plates and secured thereto, said posts securing said coil upon the said core against displacement. and serving' as clamping means tor clamping said laminations between the two sets ot two posts to maintain said laininatious in position.

5. In a repeating device, a core built up ot' a plurality ot laminatioiis. a spool tor said core provided with a plurality ot windings, mount-ing plates, tour posts positioned between said plates and secured theretoA recesses in said posts orining shoulders, the

said shoulders engaging the heads of said spool when the same is in position to prevent movement ot said coil, said posts serving as clamping means i'ior said plurality oit laininations.

3. in a repeating device, a core comprising a plurality of lai'iiiiiations, a spool tor said core provided with a plurality of windings, iiiountii'igplates, four posts positioned between said plates and secured thereto, recesses in said posts 4forming shoulders, which shoulders engage the heads ot' said spool when the said coil is in position to prevent movement said coil, said posts also clampthe laniiiiatioiis of said coie between sa d pests prevent mov ment.

T il. device of the character described iniig spool supporting a pluralityv oi? .,es, a core comprising a plurality ot laminations for said spool, a pair oi end plates, posts positioned between said end plates and to which the saine are attached, d cut-away portions ttor said posts adapti.. to receiie the heads ot said spool to secure the saine in position, the said lamination@ be inapted to extend between the two oA two posts and being clamped and ma ned in position by said two sets ot posts.

8. if. device of the character described in- (finding a spool provided with a winding, a laminated core for said spool, pair ot' end plates, iriositioiiing means extending between said end plates to which said end plates are secured, and recesses in said positioning means adapted to receive the heads of said spool to maintain the same in position, said positioning iii-ans also being adapted to cla 3 said laminated core in position 9. .3. device ot the character described including a spool provided with a winding, a laminated core for said spool, a pair ot end plates, positioning means extending between said end plates to which the saine are secured, recesses in said positioning means adapted to receive the heads of saidspool to maintain the same in position, said positioning means also being adapted to clamp said core in position, and a terminal plate secured to said positioning means provided with electrical terminals.

l0. device or" the character described including a spool provided with winding. a core comprising' a plurality ot' laminations. each lamination having two oblong openings opposite each other, the portion between said openings extending through the central opening;- in said spool, a pair ot end plates. positioning means extending be- Aid end plates to which said end are se .ured. recesses in said positionneaiis l ated to receive the heads ot er spool to maintain the saine in position` a terminal plate secured to said positioning llO means provided with electrical terminals, and a mounting plate secured to said positioning means provided with means for mounting the device as a unit.

ll. A device oi" the character described including' a spool provided with a winding, a laminated core tor said spool, a pair ol end plates, positioning;Y means extending between said end plates to which said end plates are secured, recesses in said positioning' means adapted to receive the heads of said spool to maintain the same in position, said positioning means clamping said laminated core in position apainst displacement, a terminal plate secured to said positioning' means providetL with electrical terminals, a mounting' plate secured to said positioning means provided with means for mounting;r the device as a unit, and a cover cap adapted to fit over said device to protect the same.

l2. device of the character described including a coil having' a plurality of wind.-

ings, a core comprising a plurality ot laminations. each lamination having two oblong;` openings opposite each other, said windings occupying said openings, a plate to which said coil is secured, electrical terminals and screw-threaded members extending; 'from said plate, and a mounting strip provided with an orifice, said screw-threaded members extending' through said orilicc to secure the device as a unit to the mounting' strip.

13. A device oit the character described including' a coil havinpy a plurality oit windings, a core comprising a plurality of laminations, each lamination having` two oblong' openings opposite each other, said winding occupying' said openings, a plate to which said coil is secured, electrical terminals and screw-threaded members extending from said plate, and mounting strip provided with an orifice` said screw-threaded members adapted to pass through said orilice to secure the device as a unit to the mounting strip, said electrical terminals adapted to extend through hushed openings in said mounting' strip.

14. An inductorium of the character described including' a spool provided with a plurality ot windings and having' a rectangular core ot' magnetic material, composed ot a plurality ott laminations, each lamination having two oblong' openings opposite cach other` the portion between. said openings extending through the opening' in said spool, a pair oi rectangular plates. our posts conntmtinp; said plates together, and recessed portions cut in said posts adapted to receive the heads ot said spool to maintain said coil in position. the said rectangular core for said coil leine' adapted to eX- tcnd between the two sets of two posts to maintain said core in position.

l5. ln a device of the cha acter described including a spool having a plurality of windings, a core comprising a plurality of laminations, rectangular shaped openings in said laminations occupied by said windings. the center portion ot said laminations extending through the central orifice of said spool, a pair of end plates, two sets of two posts por tioned between said end plates and to which said end plates are secured, means formed on said post which engage said spool to maintain thc same in position on said core, said posts also 'forming clamping means .tor said laminations when said end plates are secured to said two sets ot two posts.

1G. ln a device oi the character described comprising; a spool having a plurality of windings, a core comprising!y a plurality of laniinations upon which said spool is supported a pair ot end plates, two sets ot' two posts posiioned between said end plates to secure said spool in position on said core and clamp said laminations, one ot said end pla 'es being; secured to said two sets of two posts, a plurality ot terminals secured to said other end plate, which plate rests upon the other ends et said posts, a clamping plate secured to said other end ol said posts te clamp said terminal plate between said other ends ot said posts and said clamping' plate, and srrew-tln'eaded members extending; through said clamping plates to forni securing means for said device as a unit.

l?. ln a device of the character described including a coil havingi a plurality ot windings, a core comprisingy a plurality of laminations upon which said coil is supported. an end plate and a terminal plate, two sets olI two posts positioned between said end plate and said terminal plate` one end ot said posts being' secured to said end plate, a clamping' plate secured to the other end of said posts to clamp said terminal plate hetween said other ends oi said posts and the clamping' plate, said posts positioning said coil on said core and clamping said laminations, square orilices in said terminal plate, screwthreaded members provided with square heads which rest in said square orilices to prevent rotation oi said members, the threaded portions ot said members eX- tending through said clamping plate to form securing;` means for said device.

18. ln a device of the character described including a. coil having a plurality of windinns, a core comprisingr a plurality ot laminations upon which said coil is supported an end plate and a. terminal plate, two sets of two posts positioned between said end plate and said terminal plate, one end of said posts being' secured to said end plate, a clamping' plate secured to the other end ot said posts to clamp said terminal plate. hetween said other ends oi said posts and the clamping' plate, said posts when thus secured positioning said coil on said core and clamping said leminations, square oriees in seid terminal plete, oou'ntersunk oriliees in seid clamping plete in alignment with seid square orifices in seid terminal plate, screwthreaded members forming` securingmeans for seid device provided with square heads Which'rest in seid square oriiices and Connt-ersnnk shaped portions which rest in seid eonntersunk orifices in seid Clamping plete, said damning plete when in position holding seid three-ded members in position against longitudinal movement through the medium ot said eonntersunk oriee in said piste zuid eountersnnk portion oiu seid threaded member, and said square orifices in seid terminal plete and said square heads et seid threaded members preventing rot-ation et seid threaded members in said counter-sunk orifices in seid clamping' plate.

Signed by et Chicago, in the county of (leek and State ot Illinois, this 7th dey of fifenuziry, 1920.

CHARLES SPARKS. VILLL-'ili G. SHULL. 

